Hi,
I'm using Apache Axis2 1.4 client libraries to send request to a cluster
setup which uses Apache Synapse's load balancing capabilities with Apache
Axis2 endpoints. The client I've written is a non-blocking client and it
continuously generates parallel requests to a web service using separate
threads. The requests are generated at intervals between 0.1 to 0.5 of a
second. The first couple of requests goes through successfully and the
results are received by the client. However, subsequent requests wait and
get timed out after about 30 seconds. The error I get on "OnError" of the
client call back is as follows,
org.apache.axis2.AxisFault: Timeout waiting for connection
at org.apache.axis2.AxisFault.makeFault(AxisFault.java:430)
at
org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:203)
at org.apache.axis2.transport.http.HTTPSender.send(HTTPSender.java:76)
at
org.apache.axis2.transport.http.CommonsHTTPTransportSender.writeMessageWithCommons(CommonsHTTPTransportSender.java:400)
at
org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:225)
at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:435)
at
org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:402)
at
org.apache.axis2.description.OutInAxisOperationClient$NonBlockingInvocationWorker.run(OutInAxisOperation.java:442)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:713)
Caused by: org.apache.commons.httpclient.ConnectionPoolTimeoutException:
Timeout waiting for connection
at
org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.doGetConnection(MultiThreadedHttpConnectionManager.java:497)
at
org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.getConnectionWithTimeout(MultiThreadedHttpConnectionManager.java:416)
at
org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:153)
at
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346)
at
org.apache.axis2.transport.http.AbstractHTTPSender.executeMethod(AbstractHTTPSender.java:542)
at
org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:199)
... 9 more
29/05/2010 05:56:34 org.apache.axis2.transport.http.HTTPSender sendViaPost
INFO: Unable to sendViaPost to url[
http://192.168.0.251:8280/axis2/services/TestService]
org.apache.commons.httpclient.ConnectionPoolTimeoutException: Timeout
waiting for connection
at
org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.doGetConnection(MultiThreadedHttpConnectionManager.java:497)
at
org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.getConnectionWithTimeout(MultiThreadedHttpConnectionManager.java:416)
at
org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:153)
at
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346)
at
org.apache.axis2.transport.http.AbstractHTTPSender.executeMethod(AbstractHTTPSender.java:542)
at
org.apache.axis2.transport.http.HTTPSender.sendViaPost(HTTPSender.java:199)
at org.apache.axis2.transport.http.HTTPSender.send(HTTPSender.java:76)
at
org.apache.axis2.transport.http.CommonsHTTPTransportSender.writeMessageWithCommons(CommonsHTTPTransportSender.java:400)
at
org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:225)
at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:435)
at
org.apache.axis2.description.OutInAxisOperationClient.send(OutInAxisOperation.java:402)
at
org.apache.axis2.description.OutInAxisOperationClient$NonBlockingInvocationWorker.run(OutInAxisOperation.java:442)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:713)
My guess was that this timeout happens at the client and not at the server
(in this case Synapse). Here's the code that I use at the client,
private ServiceClient serviceClient = new ServiceClient();
..
..
ServiceClient serviceClient = new ServiceClient();
Options opts = new Options();
opts.setTo(this.epr);
opts.setAction(this.action);
opts.setTimeOutInMilliSeconds(9000000);
serviceClient.setOptions(opts);
..
..
..
serviceClient.addHeader(createHeader(X, Y, Z));
long total = 0;
try {
ClientSideCallback callback = new ClientSideCallback(A, B, C, D, E);
serviceClient.sendReceiveNonBlocking(this.createPayload(P), callback);
serviceClient.cleanup();
serviceClient.cleanupTransport();
} catch (AxisFault e) {
e.printStackTrace();
} catch (RemoteException e) {
e.printStackTrace();
}
*) What causes the timeout?
*) Have the timeouts got to do with the version of Axis2 client I use?
*) Any problems in the way I've coded the client?
Thanks,
WSR
